/Engine/Source/Runtime/Engine/Public/MaterialCachedData.h
void UpdateForFunction ( const [FMaterialCachedExpressionContext](API\Runtime\Engine\FMaterialCachedExpressionContext) & Context, [UMaterialFunctionInterface](API\Runtime\Engine\Materials\UMaterialFunctionInterface) * Function, EMaterialParameterAssociation Association, int32 ParameterIndex )